<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
      <el-row>
        <tree-table class="tree-table" :data="catelist" :columns="columns" :selection-type="false" :expand-type="false" show-index border>
          <template slot="isok" slot-scope="scope">
            <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color: lightgreen;"></i>
            <i class="el-icon-error" v-else style="color: red;"></i>
          </template>
          <template slot="order" slot-scope="scope">
            <el-tag v-if="scope.row.cat_level === 0" size="mini">一级</el-tag>
            <el-tag type="success" v-else-if="scope.row.cat_level === 1" size="mini">二级</el-tag>
            <el-tag type="warning" v-else size="mini">三级</el-tag>
          </template>
          <template slot="opt" slot-scope="scope">
            <el-button type="primary" size="mini" icon="el-icon-edit" @click="selectCateByID(scope.row.cat_id)">编辑</el-button>
            <el-button type="danger" size="mini" icon="el-icon-delete" @click="delCate(scope.row, scope.row.cat_id)">删除</el-button>
          </template>
        </tree-table>
        <el-pagination
              @size-change="handleSizeChange"
              @current-change="handleCurrentChange"
              :current-page="queryInfo.pagenum"
              :page-sizes="[5, 4, 8, 16]"
              :page-size="queryInfo.pagesize"
              layout="total, sizes, prev, pager, next, jumper"
              :total="total">
            </el-pagination>
      </el-row>
    </el-card>
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClose">
      <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级名称">
            <el-cascader
              expand-trigger="hover"
              v-model="selectkeys"
              :options="parentCateList"
              :props="cascaderProps"
              @change="parentCateChange"
              clearable
              change-on-select></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
    <el-dialog
      title="编辑分类"
      :visible.sync="editCateDialogVisible"
      width="50%">
      <el-form :model="editCateForm" :rules="editCateFormRule" ref="editCateFormRef" label-width="100px" class="demo-ruleForm">
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="editCateForm.cat_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      catelist: [],
      total: 0,
      columns: [{
        label: '分类名称',
        prop: 'cat_name'
      },
      {
        label: '是否有效',
        type: 'template',
        template: 'isok'
      },
      {
        label: '排序',
        type: 'template',
        template: 'order'
      },
      {
        label: '操作',
        type: 'template',
        template: 'opt'
      }],
      addCateDialogVisible: false,
      addCateForm: {
        cat_pid: 0,
        cat_name: '',
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类', trigger: 'blur' }
        ]
      },
      parentCateList: [],
      cascaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectkeys: [],
      editCateDialogVisible: false,
      editCateForm: {
        id: '',
        cat_name: ''
      },
      editCateFormRule: {
        cat_name: [
          { required: true, message: '请输入分类', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败')
      this.catelist = res.data.result
      this.total = res.data.total
    },
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCateDialog () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) return this.$message.error('获取父级分类信息失败')
      this.parentCateList = res.data
    },
    parentCateChange () {
      if (this.selectkeys.length > 0) {
        this.addCateForm.cat_pid = this.selectkeys[this.selectkeys.length - 1]
        this.addCateForm.cat_level = this.selectkeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate () {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) return this.$message.error('添加分类失败')
        this.$message.success('添加分类成功')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    addCateDialogClose () {
      this.$refs.addCateFormRef.resetFields()
      this.selectkeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    },
    async selectCateByID (id) {
      const { data: res } = await this.$http.get('categories/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询名称失败')
      this.editCateForm.cat_name = res.data.cat_name
      this.editCateForm.id = id
      this.editCateDialogVisible = true
    },
    editCate () {
      this.$refs.editCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('categories/' + this.editCateForm.id, { cat_name: this.editCateForm.cat_name })
        if (res.meta.status !== 200) return this.$message.error('修改失败')
        this.$message.success('修改成功')
        this.getCateList()
        this.editCateDialogVisible = false
      })
    },
    async delCate (parentCate, id) {
      const confirmResult = await this.$confirm('此操作将永久删除该分类, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('已取消')
      const { data: res } = await this.$http.delete('categories/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除分类失败')
      this.$message.success('删除分类成功')
      this.getCateList()
    }
  }
}
</script>

<style>
  .tree-table{
    margin-top: 15px;
  }
  .el-cascader{
    width: 100%
  }
</style>
